Sharpener for slicing machines



Dec. 19, 1933.

J. N. WOODINGTON SHARPENER FOR SLICING MACHINES Filed July 23, 1928 3Sheets-Sheet 1 Dec. 19, J N WOODINGTON SHARPENER FOR SLICING MACHINESFiled July 23, 1928 3 Sheets-Sheet 2 Dec. 19,1933.

J. N. wooDlNG-roN 1,939,754

SHARPENER FOR SLICING MACHINES Filed July 23. 1928 3 Sheets-Sheet 3Patented Dec. 19, 1933 Y 1,939,754 sHAaPENEn Fon sLICING MACHINES JohnN. Woodington, La Porte, Ind., assigner to U. S. L Slicing MachineCompany, La Porte, Ind., a corporation of Indiana Application July 23,1928. Serial No. 294,750

7 Claims.Y (Cl. 51-248) This application relates to slicing machines andmore particularly to a mountingof la sharpening mechanism for theslicing knife'of the machine such as disclosed in my prior application,Serial No. 190,758, led May 12, 1927. Y

One object of the invention is to provide an improved mounting for thesharpening stones such that the stones may be easily removed forcleaning purposes.

Another object is to provide a mounting for the sharpening stones inwhich the spindle carrying the stone is insertedinto and is resilientlyheld against the spindle sleeve to rotate as a unit with the sleeve.

A further object of the invention is to improve the mechanism forvertically adjusting the grindstone assembly.

Another object of the invention is to provide an improved mounting bywhich the rsharpening assembly is moved as a whole away from the knife.

Other objects will appear from the following description. y

'I'he invention is exemplified in the combination and arrangement ofparts shown in the accompanying drawings and described in the followingspecication, andV it is more particularly pointed out in the appendedclaims.

In the drawings:-

Fig. 1 '1s an elevational view showing the grindstone assembly insection; i

Fig. 2 is a rear view of the device showing th guide in section and withthe housing for the grindstone assembly in section to expose the 3gparts within the housing;

Fig. 3 is4 `a section through the shown atv the left in Fig. 1;

. Fig.` 4 is a detail view showing the arrangement of the-spindle in thespindle sleeve.`

Y The grindstone assembly is housed Within a casing 1 supported by a.threaded stud.2 which is threaded into the threaded bore 5 of a sleeve4.

The sleeve 4 is mounted for rotation within an upright tabularsupporting element 10 which is grindstone slidably mounted upon thebearing housing 61V for the rotary slicing knife 60. The rotary sleeve 4is provided with a'knurled part.6 fastened thereto or integraltherewith. VAlock nut 7 is threaded onto the stud 2. It will be'seenthat rotation of the sleeve 4 by the knurled part 6 Vwill result invertical adjustment of the lcasing 1. WhenV the proper adjustment ismade, the lock nut '7 is screwed down upon thevpart 6, and in order tohold the casing 1 stationary with respect to the sleeve 4, a downwardlyextending pin-16 is secured to the underside of the casing and isslidably received in an orifice 20 in a projecting part of thesupporting element 10.

f A projection is formedon the element 10, and pivoted to the projectionis a lever 67 hav- @Q ing a detent 68 extending under the knurled head 6on the sleeve'fi. The lower end ofthe sleeve 4 is provided with aprojection 8 which is received in a recess 9 formed in the base portionfor the sliding element 10, which base 35 portion isV the top of thebearing housing 61 for thevslicing knife 60. The lower end of thesupporting element 10 is T-shaped, as shown, having laterally extendingportions 11,Which slide in the groove formed by the upwardly ex- 'mVtending portions and the .strips 12 which roverhang the side edges ofthe groove and which are detachably held in place by screws 13.` A strip14 having an orifice forreceiving the projecting-end 8 of the sleeve 4,is inter- 75, posed between the lower end of the element 10 and the topsurface of the housing for the bearing of the slicing knife andissecured in place by the screws '15. The operating mechanism forretracting and projecting the grind- 30 stones is essentially the sameas that show in my prior application, aboveA referred to.

Bearing brackets 17 and 18 are secured to the bottom'of the casing 1 bymeans of screws 19, as shown in Fig. 2. The bearing bracketl 17, 35, asshown in Fig. 1, has slidably mounted therein a bearing 21 and withinthebearing 21 is rotatably mounted a bearing sleeve V22. 4The bearingsleeve 22 is formed with aange 34 and the bearing 21 is formed with arecess with- 9o in which are positioned ball bearings 26, Awhich ballbearings are held in place by theflange 34.

A Washer 23 ispinned to one end of the` sleeve 22 and co-operates withthe flange 34 for holdingthe ball bearings in place and for preventinglongitudinal movement of thel sleeve 22 in the bearing 21. The bearing21` and the bearing bracket 17 are formed with cri-operating recessesVfor receiving a spring 25 which bears at one end against the bracket 17and whichwbears at 100 the other end on the projecting portion of thebearing 2l, as shown yin Fig. 1.Y This .spring normally tends to slidethe bearing 21 to the left, as viewed in Fig. 1, and the stone 35 ispositioned to contact with the beveled edge of the knife 60 when thestone 35.,and the bearing 21 are projected forward. The bearing 21 hasfixed thereto a piny 36 which projectsupwardly and .rides in a slotformed in the bearing bracket 17.

The grindstone'47. is vmounted as shown in 110 37 and against a lip 75on the bearing bracket' 18. The bearing sleeve 38 is rotatably mountedwithin the bearing 37 and is provided with a washer or flange 39 at itsrear end bearing against thrust bearings 40 which are ,positioned in arecess formed in the bearing 37. The bearing 37 has also a pin 41 rigidtherewith riding in a slot formed in the bearing bracket 18.

A spindle 42 has secured thereto the 'grindstone 47 by means of a screw46 threaded into the end portion of the spindle. The spindle 42 is alsoprovided with a slot l43 which presses against the inner wall of thespindle sleeve 38 so that the spindle and spindle sleeve rotate as aunit. e

The spindle and' spindle sleeve for the grind- ,stone 35 is similarlyformed as shown in Fig. 4. The spindle 27 hassan end portion 32 `fittedinto an orifice of the stone 35 and a screw 33 clamps the stone betweenthe head of the screw and a flange 31 formed on the spindle 27. A secondflange 30 of the spindle A27 bears against the flanged end portion 34 ofthe spindle sleeve 22 and the spindle 27 is slotted at 28, providingprong parts 29 which are spread slightly to resiliently engage the innerwall of the sleeve 22. The spindle 42 is therefore provided withresilient means for frictionallyA connecting the smooth uninterruptedcylindrical innerwall of the sleeve 38 with the spindle to transmit tothe grinder the rotary movement of the tubular sleeve 38. i

It will be Vseen that when'V it is desired to remove either' of thestones 35 or 47, it is simply necessary to slide them out of theirrespective spindle sleeves against the vresilient action of theirslotted end portions.`

A VA Yshaft 50 is journallerd in brackets 48 and 49 carried by thebearing brackets17 and 18 land has rigid therewith the handle 58 whichis 'connected to the bracket 49 by a spring 56 tending to rotate thehandle and shaft 5i) so that cams 51 and 52 hold the stones 35 and 47away from the knife, as shown inFig. 1. The cam 51 is attached directlyto the shaft 50 while the cam 52 is carried by a sleeve 53' loose on theshaftV 50.

` The sleeve 53 has two spaced pins 55 projecting therefrom and a pin54'rigid with the shaft 50 isl arranged between the pins 55 so that theysleeve 53 with'its attached cam 52 is not'moved until after the cam 51leaves the pin 36 allowing the spring 25 to move the Vstone 35 incontact with the knife. i -After the stone 35 has contacted with thebeveled edge of the knife, the pin 54 contacts with one of the pins 55ymoving the cam 52 to release the pin 41 which allows the spring 25" tomove the stone* 47 against the other side ofthe knife to remove the burrformed by the stone 35. Uponreleasing the handle 58, the reverse actionautomatically and quickly takes place, the stone 47 moves away from theknife after the stone 35 so that the burr formed on that part of theknife between the stones may be removed.The sleeve 53 has attachedthereto j a pin 56 for contacting with a'pin 57 on Vthe bracket 49 tolimit the range of movement of thesleeve 53. Ratchet mechanism,l notshown, may also be'provided for holding the .stones in contact with theknife, as more fully disclosed in myiprior application above referredto.'`

A recess 71 is positioned rearwardly of the recess 9 and is formed inthe strip 14, as shown in Fig. 1. When the supporting element 1G is slidforwardly, as shown in Fig. l, and the projection 8 extends into therecess 9, it will be impossible to move the grindstone assembly intoinoperative position unless the lever 67 is depressed to cause thedetent 68 thereon to engage the AVbottom of the knurled head 6 to raisethe sleeve 4. This will permit the stone 47 to clear the knife 69, afterwhich the entire assembly may he slid rearwardly in the guide for theelement 10 andthe projection 8 positioned in the vrear notch 71.

It should be particularly noted that the rod 16 guides the Sharpenervertically by confining it to move along upright rectilinear lines.Therefore Ywhen the nut 7 is released and the head 6 is cylindricalsleeve 4 in the cylindrical guideway of the pedestal 10. If thesharpener is in inoperative position the projection or detent 8 will bein the recess 71. Therefore when the operator grasps the pedestal 10 andpresses the lever G7 with his thumb the detent 8 will be lifted liftedto a removing the rotary surface oi from the recess 71 and the Sharpenersufficient elevation that the burr grinder 47 will clear the upper edgeof slicing machine knife 60. The upper the plate 14 acts as an abutmentfor the lower end of the detent 8 to prevent the sharpener from beinglowered until after it has been moved rectilinearly along lines parallelto the axis of the knife into the position shown in Fig. l. That is tosay, not (until the burr removing grinder has been moved beyond theupper edge 'of `the slicing machine knife can the Sharpener be lowered,because not until then is the detent 8 in position to move into therecess in the plate 14 as shown in Figs. 1 and 2. The operator cantherefore by grasping the pedestal 10 and the lever 67 move theSharpener into operative position .by one straight line movement and inthe -same Way by a reverse straight line movement he can move thevSharpener into inoperative position where it will be held by the.detent 8 resting in the recess 71. Furthermore, the movements of theSharpener into operative position and into inoperative position may bemade very quickly without anyrisk whatever of the grinders 35 and 47engaging the knife edge, provided the lever 58-is in the position shownin Fig. 1.

While'I have shown but one specific embodimentof my invention, I desireit to be undervstood that'I contemplate making such variations that mayfall within the scope of the appended claims. 4 .k

'I'claim:-

1`. Inia slicing machine, the combination with a supporting base havingarecess therein, of a plate in said recess and secured to said base,said plate having a recess therein, a Sharpener, a pedestal for saidsharpener having means cooperating with said recess for guiding saidSharpener, andmeans-coacting with said plate r and the recess thereinfor holding the Sharpener in predetermined inoperative positions exceptwhen brought into operative relation with the knife in readiness for thesharpening operation.

2. In a slicing machine, the combination with a supporting base having arectangular guideway therein, of a Sharpener for the slicing machineknife, a pedestal for the Sharpener, a rectangular plate detachablySecured to said supporting base at the bottom of said rectangularrecess, an inverted T at that end of said pedestal remote from theSharpener, and detachable plates Secured to said supporting base inposition to coact with Said first-named plate and the guideway in Saidsupporting base to afford sliding guideways for said T to direct theSharpener to and from its position in operative relation to the slicingmachine knife.

3. A Sharpener for slicing machines comprising a rotary element having acylindrical opening therein formed with an uninterrupted Wall and havingan open end, a cylindrical Spindle for carrying a grinder adapted to fitinto the open end and support the grinder against lateral movement insaid opening, resilient prongs on the end of said spindle adapted toengage the cylindrical Wall of said opening and prevent accidentallongitudinal movement of said Spindle,

in said opening, said resilient prongs being formed by Slotting the endof said spindle Substantially in the direction of its length and makingone transverse dimension of the slotted portion of said spindle greaterthan the diameter of said opening, andV a conically shaped extension onthe ends of Said prongs to facilitate insertion of the spindle into saidopening, Said frictional engagement between said prongs and the innerwall of Said opening being Suflicient to cause rotation of said elementand spindle in unison with each other upon rotation' of either saidelement or said spindle without interfering with the removal of saidspindle from Said opening by an axial pull on said spindle.

4. A Sharpener for slicing machines comprising a rotary element having acylindrical opening therein formed with an uninterrupted wall and havingan open end, a cylindrical Spindle for carrying a, grinder adapted tofit into the open end and support the grinder against lateral movementin Said opening, resilient prongs on the end of said spindle adapted toengage the cylindrical wall of said opening and prevent accidentallongitudinal movement`of said spindle in said opening, and a conicallyshaped exten- Sion on the ends of said prongs to facilitate insertion ofthe Spindle into said opening, said frictional engagement betweensaidprongs and the inner Wall of Said opening being Suficient to causerotation of Said element and spindle in unison with each other uponrotation of either said element or said spindle without interfering withthe removal of Said spindle from Said opening by an axial pull on SaidSpindle.

5. In a slicing machine, the combination With a knife Sharpener, of asupport, a cylindrical guideway in said support, a screw threaded StudSecured to Said Sharpener, a sleeve tting in and guided by said guidewaylongitudinally thereof and for rotation therein and having internalScrew threads meshing with the threads on Said Stud, means on Saidsleeve for turning the Same on said stud to move Said Studlongitudinally of said Sleeve to thereby movesaid grinder to and .fromSaid support, and means for guiding the Sharpener as it moves to andfrom Said Support.

6. In a slicing machine, the combination with a Supporting base, of aSharpener for the slicing machine knife, a pedestal for Said Sharpener,and a tongue and groove connection between Said Sharpener andSaidpedestal extending in a substantially horizontal direction and atSubstantially right-angles to' the cutting plane of said knife.

'7. In a slicing machine, the combination with a knife Sharpener, of aSupport, a cylindrical guideway in Said support, a Stud Secured to SaidSharpener, a Sleeve fitting in and guided by Saidy guideway having aninternal bore for receiving the end of said Stud, means for adjustingSaid Stud vertically relative to Said sleeve, said Stud having verticalmovement relative to Said support independently of Said adjustment, andmeans for guiding the Sharpener as it moves to and from said support andfor preventing rotative movement thereof.

JOHN N. WOODINGTON.

